PorphyrocrinusPorphyrocrinus is a genus of crinoids within the family Phrynocrinidae. Members of this genus have been found from 2103 to 4240 meters below sea level.SpeciesPorphyrocrinus daniellalevyae Porphyrocrinus incrassatus Porphyrocrinus thalassae ''Porphyrocrinus verrucosus''